Beverage dispensing machine



Oct. 19, 1937.

W. LAMBERT BEVERAGE DISPENSING MACHINE Filed May 12, 1936 5 Sheets-Sheetl FROM WATER sunmx Human w. LAMBERT 2,096,522

BEVERAGE DISPENSING MACHINE I Filed May 12, 1936 5 Sheets-Sheet 2 Oct.19, 1937.

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1937. w. LAMBERT 2,096,522

BEVERAGE DISPENSING 'MACHINE Filed May 12, 1936 5 Sheets-$heet 5 0a. 19,1937. w. LAMBERT 2,096,522

BEVERAGE DISPENSING MACHINE Filed May 12, 1936 5 Sheets-Sheet 4 J25 07I. l 106 103 96' 19 76 94 c an], I111 gwuc/wboo WT-Lambert Oct. 19,1937.

w. LAMBERT BEVERAGE DISPENSING MACHIN I Filed May 12 1936 5 Sheets-Sheet5 RAIN Patented Oct. 19, 3937 "UNITED STATES PATENT oFFics WalterLambert, Yakima, Wash. Application May12, 1936, Serial No. 79,346

N 19 Claims.

This invention relates to improvements in beverage dispensing machines,and its objects are as follows: N

First, to provide a machine by the use of which the purchaser candispense to himself 'a cold, freshly mixed carbonated beverage of anyflavor of syrup stored in the machine.

Second, to provide a machine of the foregoing character, 'which isgoverned in the extent of 1 its operation by a coin control, said coincontrol limiting the amounts of dispensation of the beverage.

Third, to provide for the use of currently known dry ice (compressedcarbon dioxide gas),

and to put the expanded gas offthis ice to the three-fold purpose of (1)refrigerating the water and fruit syrups, (2) carbonating the water and(3) producing the motive'fiuid'for simultaneously expelling thecarbonated water and selected fruit syrup from the respective pumps intothe drinking glass wherein the mixture occurs.

Fourth, to use a motor-driven circulating contrivance, either a rotarypump or blower, to intermingle the carbonic acid gas and water tocarbonate the water, said contrivance being operable at governedperiods. Fifth, to have the carbonated water pump constantly inreadiness for operation but to make the operation of the fruit syruppumps subject to selection, then to simultaneously operate both pumps,namely, the carbonated water and the selected fruit syrup pump, throughthe instrumentality of the coin control.

Sixth, to provide what is herein conveniently termed a lock-out devicefor insuring the operation of only one selecting button at a time, saiddevice being-so arranged that a selected button will stay pushed in andwill not return to its normal position until released upon the 4Upushing in of the next button.

Other objects and advantages will appear in the following specification,reference being had to the accompanying drawings, in which:

Figure 1 is a front elevation of the improved 1.3 beverage dispensingmachine. Figure 2 is a plan view thereof, a portion being broken away.

Figure 3 is a cross sectiontaken on the line 33 of Fig. 1. Y

JJ F gure 4 is a detail section taken on the line 4-4 of Fig. 1 andillustrating the structure associa d with one of the fruit syrup pumps.

F'gure 5 is a horizontal section taken on the line 5-5 of Figure 1.

05 Figure 6 is a horizontal section taken on the line 6-6 of Fig. l,showing the look-out device.

Figure '7 is a section similar to Fig. 4, and illustrating the expellingaction of the fruit syrup pump when the respective selected button ispushed in. 5

Figure 8 is a. detail horizontal section taken on the line 8-8 of Fig.4, illustrating the action of the lock-out device upon pushing theselected button in.

Figure 9 is a companion section showinghow 0 the look-out device insuresthe release of the selected button when another is about to bepushed in.

Figure 10 is a detail cross section taken on the line Ill-l0 of Fig. I,particularly showing the 15 clutch notches in the front wall of thehousing.

Figure 11 is a detail section on the line 1 ill of Fig. 4, showing thecorresponding clutch notches in one of the worm gears.

Figure 12 is a section taken on the line I 2-12 20 of Fig. 8.

' Figure 1'3 is a section taken on the line l3-l3' of Fig. -'7.

Figure 14 is a horizontal section taken on the line 14-44 of Fig. 3.

Figure 15 is a detail sectional and elevational view especially showinghow the syrup tubes are combined at the syrup discharge outlet.

Figure 16 is a detail cross section taken on the line |6l6 of Fig. 15,particularly showing the nozzle end of the carbonated water outlet.

Figure 17 is a cross section taken onthe line ll-l'l of Fig. 14,particularly illustrating the details of the carbonated water pump.

In carrying out the invention, provision is made of an appropriatesupport generally designated I, which is herein shown as a frameworkbuilt up of angle irons. This support is designed to carry all of theparts of the machine, and is subject to considerable modification as maybe made necessary by changes in the proportions of the parts that itcarries. For the purposes of this description the support consists offront legs 2, rear legs 3, an angle iron rectangle 4, cleats 5, and anappropriately braced shelf 6.

, A housing is so fitted in the framework that its bottom 8 rests on therectangle 4 (Fig. 3) its front wall 9 extends upwardly inside of thefront legs 2, and that its 'rear wall l0 extends upwardly inside of therear legs 3. The housing also has side walls H (Fig. 14). These are cutout in the direction of a circle at l2 (Fig. 3) to provide a cradle fora tank generallsgdesignated i3. This tank is additionally supported bythe upper curved terminals ll of the front-legs 2.. A plate. g

l (Fig. 3) is laid upon and fastened to the cleats 5 providing not onlya brace, but a shelf as well.

I In the approximate center of the machine, and at the back there is anupright dry ice container l 6 (Figs. 3 and 14). This comprises an innershell II which holds a quantity of dry ice IS. The outer shell I9 isspaced from the inner shell and the space has the air exhausted from itso as to reduce the exchange .of. heat to a minimum. The two shells areconnected by a top annulus 20 (Fig. 3) from which a number of stud bolts2| extend upwards. Winged nuts 22 are screwed downwardly on these boltsagainst the flange of a cover 23 so as to secure the latter against agasket 24. This is a tight fit, and it prevents the leakage of gas fromthe container. The removal of the cover enables the replenishment of theice supply.

Arranged along the rear wall I0 and on the inside of the housing I is aplurality of syrup containers 25. All of the containers I6, 25 stand onthe bottom 8. Each container 25 will have a syrup of a different fruitflavor, and the number used will depend on the size of the machine. Theinstant showing is confined to nine containers, but in the followingdescription only the container to which the lead line from the numeral25 is run will be referred to in detail.

This container, as well as each of the others, has a screw cap 26(Fig. 1) which when removed from the companion opening enables thereplenishment of the syrup supply. A manifold 21 extends along theseries of containers 25, there being a lateral 26 connecting eachcontainer with the manifold. The manifold conducts cold carbonic acidgas from the inner shell I! (Fig. 3) to each of the syrup containers.Each lateral contains a valve 29 which is intended to be closedpreparatory to removing the screw cap 26 so that there will not be anunwarranted loss of gas.

The manifold 21 (Fig. ,3) has a pipe connection 36 to the inner shellII. It is through this that the cold gas is derived. Saidconnectioncontains a valve 3| which is adapted to be closed upon removal of thecover 23 so that the cold gas already in the system will not escape. An

extension 32 of the pipe connection 39 leads from the manifold 21 to theouter dome 33 on the outer shell 34 of the tank I 3. An inner shell 35with a corresponding but smaller dome 36 defines a space 31 into whichthe extension 32 discharges gas from the dry ice container Hi.

This gas sets up considerable pressure in the system and, being cold,tends to travel downwardly in the space 31 (Fig. 3) so as to practicallyenvelop the inner shell 35 which contains a volume of water 38.Eventually the gas in the space 31 escapes into one or more ducts 39(Fig. 1) formed on the outside of the shell 35. The gas entering theseducts escapes at openings 46 (Fig. 3) into the interior of the shell 35,whence it reaches the dome 36 and enters a set' of connected pipes 4|which eventually join the manidesired pressure. Should the internalpressure nected to a discharge tube 58.

become excessive this valve will open and. prevent damage to themechanical parts.

A pipe 43 (Fig. 1) leads from the water supply to the inner shell 35. Avalve 44 on the inner end of the pipe is controlled by a float 45,opening and closing the valve when the water sinks and rises to itsextreme levels. A gauge glass 46 indicates the water level. A pressuregauge 41 indicates the internal gas pressure. A thermometer 48 indicatesthe temperature.

-A'pair ofperforated pipes 49, 56run lengthwise of the inner shell 35,one being near the top and the other being submerged by the water 38.The pipe 49 is connected to the outlet of a centrifugal pump 5| which isfastened to the shelf 6 (Fig. 1) in common with a motor 52 which iscoupled with the pump for driving the impeller. The pipe 50 is connectedto the center inlet of the pump 5|, and when the latter is operated a,circulation of water is set up within the inner shell 35, serving tocarbonate it.

This circulation consists of drawing the water into the pipe 50 (arrow11, Fig. 1) and expelling it in the form of a spray (arrow b). Thisspray is discharged throughthe atmosphere of carbonic acid gas, theintimate contact with the gas carbonating the water. The motor 52 is, inpractice, connected in circuitewith a contrivance which will cause it tooperate at desired periods. This periodic operation of the motor .willcause a pcriodiccirculation within the inner shell so as to always havethe water. 38in condition for completing a mixed drink.

The manner in which ameasured quantity of carbonated water is dischargedfor the foregoing purpose is as follows; a tube 53 (Fig. 17) leads fromthe inner shell 35 to a pair of laterals 54, 55, which have extensions56, 51, which are con-. This tube runs forwardly in the housing '1,extending through the front wall 9 (Fig. 5) where it terminates in aspout 59. This spout is curved downwardly so as to direct the water intothe drinking glass 60, and it is capped with a nozzle 6| (Fig. 16) whichincreases the pressure of the discharging water because of the fineorifice that it has. Thispressure discharge of the water is relied uponto produce the mixture of the fruit syrup in the glass. For this purposethe spout 69 is flanked by another and similar spout 62 (Fig. 5). Thisspout is for the discharge of the fruit syrup and it does not have anequivalent of the nozzle 6|.

Both spouts are directed into the drinking glass 66, and when theydischarge the carbonated water and syrup the mixture takes place in theglass. The latter is stood upon a tray 63 that I extends forwardly fromthe housing. It is to be noted that both spouts 59, 62 stand on a slightupward pitch. The purpose of this is to cause both water and syrup todrain back after a discharge into the drinking glass so that there will.is intended to deliver approximately five ounces of carbonated water tothe drinking glass 60. Its opposite ends, now designated 68, 69, aresecured to the ends of the cylinder against ring washers 16. These aresufficiently oversized to project into the cylinder and provideabutments for the piston 61 when the latter completes its movements inalternately opposite directions.

A shaft 1! consisting of the front and back parts 12, 13 is attached tothe cylinder ends and is turnably supported in bearings 14, 15 at itsextremities. The bearing 14 is attached to the front wall 9, while thebearing 15 is attached to a plate 18 upstanding from the bottom 8.

The front and back parts 12, 13 of the shaft 1| (Fig. 17) haveoppositely extending passages 11, 18 which communicate with the pumpcylinder 69 at their inner ends and terminate in oppositely directedports 19, at their outer ends. These ports lie in the zone of thelaterals and their extensions, and when the shaft 1| is given a halfturn these ports are reversed in position so that carbonated water(being under pressure) is discharged first from one end of the pumpcylinder and then the other into the discharge tube 58, whence it flowsto the drinking glass.

Tapered sections 8| on the shaft 1| match corresponding bores in thevalves 64, 65. Springs 82 are so fitted in place as to keep the taperingsurfaces in good contact. Any wear in these surfaces is compensated forby slip-joints 83 both in the tube 53 and the discharge tube 58. A wormgear 8 3 is secured to the shaft 1|. This gear is in mesh with a wormpinion85 on a drive shaft 88.

The foregoing carbonated water pump (Fig. 17) is in gear all of thetime, but only one of the plurality of companion syrup pumps is in gearat a time, and the one which is in gear is subject to selection. Thedrive shaft 80 is permanently connected by a gear train 81 (Fig. 5) tothe shaft 88 of a mechanism 89in the coin control box 99. This mechanismis subject to only one operation by a full 360 turn of the finger-piece9| when a coin is inserted in the slot 92 (Fig; i). The details of themechanism 89 are not essential here, it being suflicient to say thatwhen the fingerpiece 9! is given one full turn, the shaft 86 is given acorresponding full turn, but inasmuch as the pinion 85 (Fig. 17) is halfthe size of the gear 84 it follows that the shaft 11 receives only ahalf turn. It is this half .turn that reverses the positions of theports 19, 80 at every operation of the finger-piece 9|.

The manner in which the syrup is dispensed 'is as follows; the pumpcylinder I05 is only one of a plurality of similar cylinders in thehousing 1 (Fig. 14). The syrup pump cylinders are smaller, beingintended to discharge one ounce of syrup. Since all of the syrup pumpsare alike in construction, the present description isconfined to thepump which goes with the previously selected syrup container '25. A tube93 connects with the bottom of this container, and has a pair oflaterals 951. 95 (Fig. 4). extensions 95. 91 which connect with adischarge tube 98. This tube eventually communicates with the spout 82.(Fig. 5) but it is connected directly to a manifold 99 (Figs. 5 and 15)which is the common end of all similar syrup discharge tubes. The spout62 is actually an extension of the manifold 99, and asthe syrup isdriven into the manifold under pressure, it opens a flap valve I00 (Fig.15), the particular purpose of such corresponding valves at the ends ofthe other syrup d scharge tubes being to avoid driving the syrup into aconfronting tube rather than into the discharge spout.

The aforesaid laterals and their extensions (Fig. 4) are connected byvalve casings IOI--I02.

These confront the respective ends I03, I04 of These laterals have whichprovide abutments for the piston as in the.

instance of the carbonated water pump 66. A shaft I01, consisting offront and back parts I08, I09 has tapered sections I I0 which match thetapered bores of the casings IOI, I02 and completethese valves.

Pass-ages III, H2 in the front and back parts ofthe shaft I01communicate with the opposite ends of the pump cylinder I05 and at theiropposite ends have oppositely directed ports H3, H4, 7 which work in thezone of the laterals and their extensions. Springs II5 maintain a tightfit in each of the two valves, and slip-joints i I8 in the tubes 93, 98compensate for wear.

Bearings H1, H8 (Fig. 4) support the opposite ends of the shaft I01. Thefront wall I09 constitutes the common mount for all of the frontbearings, while the upstanding plate 'lfiprovides the common mount forall back bearings. The front wall 9 is diametrically oppositely notchedat H9 (Figs. 4, '1 and 10) to contain the correspondingly positionedlugs I20 (Fig. 13) of a clutch I21 when these project through into thebearing H1 in the forward and locking position of said clutch (Fig. 4).This clutch is slidable on a spline I22 set in the front part I08 of theshaft and when the clutch is in said forward position with its lugs I20in the notches II9, the shaft I01 is locked against the half turn thatis necessary to reverse the positions of the ports I I3, I I4 for thenext syrup dispensation.

Lugs I23 on the clutch I2I corresponding to the lugs I20, but on theopposite ends of the clutch, are engageable with diametrically oppositeopenings I24 (Fig. -11) through the worm gear I25, which is loose on theshaft I01. There is a special feature connected with theclutch .I2I thatis enlarged upon later. The previously mentioned gear is held inpositionpn the shaft by the end of the spline I22 on one side and a setcollar I26 on the other side. It is in constant mesh with a worm shaft86.

All of the worm pinions on the drive shaft 86 are alike, and all arefastened to the shaft so that when the coin control 90 is operated,following the insertion of the coin, all of the worm pinions are given acomplete turn. All of the worm gears corresponding to on the syrup pumpshafts corresponding to I01 are alike, all being loose on the respectiveshafts. All of these gears are given a half turn when the coin control90 is operated, but only the worm gear of the selected syrup pump willbe effective in dispensing a charge of syrup, and the selection isaccomplished in this way; a button I28 (Fig. 4) is adapted to be pressedin. This button is fixed on the outer end of a button shank I 29, theinner end of whichis sharpened to a point I30. The shank carries a forkI3I (Fig. 13) which occupies a circular groove I32 in the clutch I2I.Upon pushing in of thebutton 12s the clutch I2I is moved from itslocking engagement with the front wall 9 (Fig. 4) to an operatingengagement with the worm gear I25 (Fig. '1), changing the shaft I 01from being locked against turning into readi- The button I28 is directlyassociated with the pinion I21 on the drive lock-out device generallydesignated I33 (Fig. 6).

This device occupies a transverse position, and

the button shank I29, as well as all others like it, work crosswise ofthe lock-out device, pointing into the machine (Fig. 6). Bars I34, I35,I36 and I31 are disposed in parallelism to each other and are secured tothe side walls II, as at I38. The bars I34, I31 have holes I39 as doesthe front wall 9 thereby providing a guide for the button shank I29. Thebar I34 is secured v close to the front wall 9 and forms a brace. Thebars I35, I36 comprise a guide pair. Theyhave a locking bar I40 slidablebetween them. The last bar I31 is slightly spaced from a channel ironI4I which is appropriately secured at its ends to the side walls II soas to be in fixed relationship 15 to the foregoing bars. One of itsflanges has a hole I42 which the pointed end of the shank I29 is adaptedto enter.

A wedge lug I43 (Fig. 6) on the side of the button shank I29 is movablein registering slots m in the guide bars I35, I36 and is movable thlOlEha slot I45 in thelocking bar I40 (Figs. 6 and 12). The wedge lug has apoint I45, 8. high place I41 and a heel I48. The lug slopes from thepoint to the high place and then recedes slightly toward the heel. Theregistering slots I44 are merely to provide for the passage of thewedgelug. When the lug moves nwardly by pressing the button I28 (Fig. 8)the locklrm bar I40 is displaced toward the right by the high place I41,and when the lug reache its inward limit the locking bar I40 springsback to position behind the heel I49, locking the button and its carriedparts to the pushed-in position.

A spring I49 (Fig. 6) permanentlytends to move the locking bar I40toward the left. It is against the tension of this spring that thelocking bar is displaced toward the right, and when the wedge lugreaches the inward position the spring I49 causesthe locking bar to snapbehind the heel I48. A spring I50 on the button shank I 29 serves toreturn the button I28 to its original position when the wedge lug I43 isreleased.

This spring bears against a cross pin Il' on the button shank. Therelease of the button shank I29 (Fig. 8) occurs when the button ofanother fiavor selectionis pushed in. Each of the series of buttons willbe labeled with the flavor of syrup which its operation will dispense.Itis impossible to push in two buttons at a time, this 0 being preventedby a series of blocks I52 (Fig. 6)

the division lines I53 of which register with the axial centers on therespective button shanks. The ends of these blocks are beveled adjacentto the division lines so as to form conical recesses 55 I54 matching theshape of the point I30. When the button I2$is pushed in (Fig. 8) thepoint of its shank enters the recess I54 and parts the blocks againstthe tension of end springs I55, I55

' (Fig. 6). These springs bear against the side walls II and are largelycontained by end block 65 ing is such as to virtually disappear when theJ shank I29 is pushed in (Fig. 8) to part the block series.

The resulting displacement of the blocks-so that their division lines donot register with the 70 axial centers of the remainingbutton shanks,

causes said blocks to form an obstruction against any other shank beingpushed all the way in.

But the shank of another selection will, upon being pushed in,automatically release the shank 75 I29 (the one that is now pushed in)and then in ers.

turn rearrange the blocks I52 so as to lock out the other *buttonshanks.

At this point reference is again made to the clutch I2I for the specialfeature mentioned before. The clutch has a provision that will make itimpossible to shift gears during a dispensing operation. Said provisionconsists of making the lugs I20, I23 (Figs. 4 and '7) substantiallyequal in lengthto the wedge lug I43, and to closely space the ends ofthe lugs I23 from the adjoining face of the gear I25 when disengagedfrom the openings I24.

This allows only an almost imperceptible movement of any dormant buttonshank should the operator attempt to push in the button of such a shankwhile a dispensing operation is in progress. The foregoing ends of therespective lugs I23 would contact the blank surface of the turning gearand block the attempt, in other words, prevent the gear shift.

Again, the ends ofthe lugs I20 are closely spaced from the front wall 9when'the clutch I2I is engaged with the gear I25 (Fig. 7) thus making itimpossible to disengage the clutch until the dispensing operation iscomplete. The ends of the lugs I20 then confront the blank face of thewall, and-it is not until they are brought into registration with thenotches H9 at the endof a full half-tum that the clutch can be shiftedforwardly or away from the gear I25.

The critical overall length of the clutches I2I (from end" to end of thelugs I20, I23) and their closeness to the blank faces of the front wall9 and gears I in the instances set out above,

makes it impossible to either clutch in a new selected fruit syrup intothe drinking glass 60 every time the coin control 90 is propertly op-'erated. ,All syrup tubes corresponding to 93 connect with the bottoms ofthe syrup contain- There is therefore some gravity flow, but the gaspressure is depended upon to actually drive the syrup into the drinkingglass. This is' so because} gas pressure is imposed upon the syrup ineach container, just as gas pressure is imposed upon the water 38 in thetank I3.

The second button I28 from the'left (Fig. l) is the one herein selectedfor illustration. This button can be pushed all the way in only after apreviously selected button has been permitted to return to its originalposition. When this button I28 reaches the inward limit, the locking barI snaps behind the wedge lug I43 and holds the button in the inwardposition (Fig. 8). This act moves the clutch I2I from its lockedposition against the front wall 9 (Fig. 4) into the position ofengagement with the worm gear I25. The respective pump I05v is now ingear with the drive shaft 95 whereas it was not so before, thus matchingthe condition of the carbonated water pump 66 (Fig. 17) which is alwaysin gear with the drive shaft 93. The latter is not capable of 'beingturned until a coin is in--o serted in the slot 92 '(Fig, 1) and themechanism 89 thereby rendered active to couple the gear train 81 (Fig.to the finger-piece 9|.

The latter is now given a full turn. This full turn is imparted to thedrive shaft 86, but because of the reduction between the pinion i2! andworm gear i25, theshait I01 (Fig. 4) makes only a half turn, anddesirably so in order to reverse the positions of the ports H3, I I4(Figs. '4

as the result of an earlier operation, is now in the path of pressurefluid flowing in the tube 93 in the direction of arrows c (Fig. '7) andin moving in the direction of arrow 11 by force of the pressure fluid,drives out the charge of syrup at the right of the piston, into thedischarge tube 88, manifold 99 and syrup spout 62.

Simultaneously with this syrup dispensing op-. eration the pump 66 (Fig.1'7) dispenses a charge of carbonated water. The ports 19, 8B arereversed in position simultaneously with the reversal of the ports H3,M4, the pump cylinder 66 turning as these ports are reversed, and acharge of water acting against the left end of the piston B'i drives outthe charge at the right into the discharge tube 58 and so on into thedrinking glass where it mixes with the fruit syrup.

The water and syrup pistons 81, I96 are thus driven back and forth inthe respective cylinders in alternation in their dispensing operations.The charges of water and syrup which now enter the pump cylinders underpressure to actuate the pistons lie dormant until a succeedingdispensing operation when said charges are driven out under pressure ofwater and syrup in the opposite direction. i 7

Assume that after any prior dispensing operation the first button at theleft of the series (Fig. 1) is the next selection. When this button ispushed in far enough (arrow e, Fig 9) to bring its point I30 intocontact with the nearest block I52, the. wedge lug onthe shank of saidbutton will have displaced the locking bar I40 sufliciemly far towardthe right to clear the path for the lug I43 of the previously selectedbutton I28 (Fig. 9) which, up to this time, has been regarded as lockedin the inward position (Fig. 8).

A path having been cleared for the lug of the second button, it is plainthat the latter can move outwardly in the direction of arrow f (Fig. 9)and by the time this lug has reassumed approximately its originalposition, the button l28 then being approximately at its originalposition also, the blocks I52 will close again under the.

' lines I53 being restored to the axial positions whence partition canoccur again when the left end button is pushed the remaining way in. It

is repeated that these acts cannot occur while a dispensing operation isin progress.

At such a time all gears I25 are turning, only one, however, beingefiective to dispense syrup, and since the openings [24 will then betraveling the circle it follows that the ends of any pair of lugs I23would only strike a blank face if a pushing in attempt were made.

From this description of the lock-out device and the clutches (Figs. 6,8 and 9) it should be clear that the pushing in of any button willunlock any syrup dispensing unit already in gear insures thedispensation of only one charge of fruit syrup by any single paidvending operation. Reverting to the action of the centrifugal pump 5|(Fig. '1) it is considered optional whether this shall be a water pumpor an air pump. The top pipe 49 can be introduced into the centralintake of the pump, and the pipe 50 connected with its outlet. Theaction then would be to cause the carbonated air to bubble up throughthe water rather than to spray the water through the air. In either casethe result would be the same.

I claim:

l. A beverage dispensing machine comprising a water tank, a syrupcontainer, water and syrup pumps having connections to the respectivetank and to the container, a fluid pressure source coupled with the tankand container to put the water and syrup under pressure, and means forutilizing the fluid pressure against the water and syrup columns foroperating both pumps simultaneously to dispense charges of water andsyrup previously entrapped in said pumps into a drinking glass.

2. A beverage dispensing machine comprising a water tank, a syrupcontainer, a dry ice container and piping for leading the gas therefrom.

tainer having connecting piping both to the tank and syrup container,the dry ice vapor refrigerating the water. and syrup and placing bothunder pressure, a pair of pumps, each including a floating piston,piping connecting the opposite ends of one pump to the water tank,similar 'pip'kn-g connecting the opposite ends of the other pump to thesyrup container, discharge pipes for the two pumps, both discharge pipeshaving connections to the opposite ends of the respective cylinders,valve means for each pump for reversing the application of pressurealternately to the opposite ends of the pump cylinders, thereby movingthe floating pistons to drive out previously contained charges of waterand syrup into the respective discharge pipes, and coin controlled meansby which to actuate the valve means.

4. In a beverage dispensing machine, a water tank, a plurality of syrupcontainers, a. manifold common to' all of the containers and havinglaterals leading to each container, 9. dry ice ,container, pipingconnecting the dry ice container with the tank and manifold to conductthe dry ice vapor for refrigerating water in the tank and syrup in thesyrup containers and to, place both under pressure, and valves in eachof the laterals and in the piping enabling closing ofi a desired syrupcontainer and closing ofi the-ice container preparatory to replenishingthe supplies of syru and dry ice.

5. In a beverage dispensing machine, a water tank, a dry ice containerhaving piping connected to the tank to conduct dry ice vapor to saidtankfor refrigerating water containedthereby and to place it underpressure, and means for periodically causing an intermingling of thevapor and water to carbonate the'wat'en- 6. In a beverage dispensingmachine, a water given off by dry ice in said container to the tank forrefrigerating water therein and to place it under pressure, a pair ofperforated pipes in the tank, one being situated in the atmosphere ofgas and the other submerged by the water, a centrifugal pump which hasan outlet and an inlet to which the respective pipes are connected, anda motor for driving the pump to cause awirculation of the water throughsaid pipes and through the gas for an impregnation of the water withgas.

- 7. A beverage dispensing machine comprising a water tank, a pluralityof syrup containers, a dry ice containerand piping leading therefrom tothe respective tank and syrup containers for the conduction of carbonicacid gas thereto to refrigerate the water and syrup and place them underpressure, a Water pump connected with the tank, syrup pumps connectedwith the respective syrup containers, all of said pumps having dischargetubes, a coin control and valve means which is actuated when the coincontrol is operated to utilize the gas pressure for driving out chargesof water and syrup, and means which is operated by manual selection tomake only one of the syrupvpumps operative so that the selected pumpoperates simultaneously with the water pump. I

8. In a beverage dispensing machine, a water pump, at least two syruppumps, a floating piston in each pump, sources of'water and syrup supplyto fill the respective pumps with water and syrup, valve means anddischarge tubing for each pump, operating means for each valve means,the operating means of the water pump being permanently in gear with therespective valve means,

selecting means to render one operating means of the syrup pumpseffective to actuate that respective valve means, and means which isworked by hand to actuate the operating means causing a simultaneousoperation of the valve' means of the water pump and the selected syruppump for a movement of their. pistons to drive out charges of water andsyrup.

9. In a beverage dispensing machine, a water pump, at least two syruppumps, each pump having a floating piston, reversible valves at the endsof the pumps, tubing connecting the water pump valves to a source ofwater under pressure, tubing connecting the valves at the ends of the syp pumps to sources of syrup under pressure, the respective valves alsohaving water and syrup discharging tubin means which when workedreverses'the positions of the water pump valves and of one of the syruppump valves, thereby admitting water and syrup under pressure to "movethe pistons and drive out charges of water and syrup into the dischargetubings, and selecting means by which only one of the syrup pumps isrendered active to operate simultaneously with the water pump.

10. A beverage dispensing machine comprising a tank containing waterunder pressure, a plurality of containers each having syrup underpressure, a single water pumpland a plurality of syrup pumps havingconnections to the respective tank and containers, means by whichtooperate the water pump simultaneously with one of the syrup pumps,selecting means by which only the one syrup pump can thus be operated,and a lock-out device for insuring the operativeness of only the onesyrup pump, said lock-out device als entering the opposite sides of thecasings, and

means for turning the shaft to reverse the positions of the ports,thereby admitting pressure liquid flrst to one and then the other end ofthe cylinder to actuate the piston for driving previously admittedcharges of liquid into the exhaust tubing.

12. In a beverage dispensing machine, a liquid pump including a floatingpiston, a tubing communicating with a source of pressure liquid havinglaterals. at the respective ends of the pump, a discharge tubing havingmatching laterals at the opposite ends of the pump, valve casings inwhich the laterals are connected, said casings having tapering bores, ashaft carrying the pump, having tapered sections occupying said bores,said sections having oppositely directed ports merging into passages inthe shaft which communicate with the opposite ends of the pump,resilient means between the pump ends and valve casings to keep thetapered sections seated, and

slip-Joints in the tubings between the laterals to compensate for wearin the valve casings.

13. In a beverage dispensing machine, a single water pump, at least twosyrup pumps, each pump consisting of a cylinder and a floating piston, aturnably supported shaft for each pump consisting of front and backparts connected with thei'respective ends 'of each cylinder, each shafthaving passages communicating with the opposite ends of the cylindersand having opposltely directed ports, valve casings at the ends of thepump cylinders, said casings having the ports confined therein andhaving pairs of laterals which connect with inlet and discharge tubingsfor'the admission of pressure water and syrup and the discharge of waterand syrup, a

common drive shaft, gearing permanently in gear between thedrive shaftand water pump shaft,

14. In a beverage dispensing machine, a liquid pump including a closedended cylinder and a floating piston. a shaft connected to the ends ofthe cylinder, valve means combined with the shaft, and a source ofpressure liquid connected with the valvemeans, a gear loose on, theshaft, an element confronting the gear and flxed relatively to theshaft, a clutch splined on the shaft being engageable with said elementto prevent turning of the shaft, means to shiftthe clutch intoengagement with the gear, and means to then turn the gear and so turnthe shaft for a reversal of the valves to admit pressure liquid to oneend of the cylinder for moving the piston to; drive out a previouslyadmitted charge of liquid.

15. In a beverage dispensing machine, a plurality of liquid pumps, onefor water, the others for syrup, a pair of valves for each pump, said'pumps with which the pairs of valves are combars withregistering slotsin which the lugs can bined so that when a shaft is turned therespective valves are reversed in position, driving means permanentlycoupled with the water pump shaft and loosely coupled with the syruppump shafts, push button operated clutch means for eachsyrup pump beingselectable to clutch in the coupling between the drive means and theshaft of the selected pump, and a lock-out device with which the pushbuttons are combined; said lock-out device including means holding aselected button when pushed in and also causing the release of saidbutton as another button is pushed in, but before said button can bepushed in far enough to clutch in the respective coupling means.

16. In a beverage dispensing machine, a plurality of syrup pumps, valvemeans combined with each pump which, upon operation, releases a chargeof syrup, drive means which, upon being worked, actuates the valvemeans, an equal plurality of push buttons enabling a selectlonof thevalve means to be worked, each push button having means for coupling theoperating means to the respective valve means, a shank for each pushbutton, a wedge lug on eachshank, fixed guide move, and a locking barguided by said pair of bars having a spring placing it-under tension,the pushing in' of one button'causing the wedge lug to displace thelocking bar, and to hold the button by catching the lug, and a spring oneach I button shank causing the' return of the pushed in button whenanother button is pushed in and its wedge lug again displaces thelocking bar to release the previously held lug. i

17. In a beverage dispensing machine, a plurality of selectable pushbuttons, each having a pointed shank, guide means by which the shanksare'movably carried, a channel iron confronting the guide means andhaving holes in line with the points of the shanks, a series of blockscontained by. the channel iron, the division lines of the blocks beingadapted to register with the axial centers of the shanks to enableparting the blocks by the point of one shank when its button is pushedin, and block sections at the ends of the block series, each havingsprings engaging adjacent abutments, the amount of parting movement ofthe blocks being approximate equal to the diameter of a shank.

18. In a beverage dispensing machine, at least two liquid pumps eachincluding a cylinder and a floating piston, shafts connected to theendsof the respective cylinders, valve means combined with each shaft, and asource of pressure liquid connected with the respective valve means so Ithat when a selected valve means is turned there .solid side of thegearing, each gear having openings to admit the respective lugsaccording to selection.

19. In a beverage dispensing machine, a housing which includes a frontwall, a liquid dispensing device in the housing which consists of acylinder having a floating piston, a shaft which consists of portionsconnected to the ends of the cylinder, one of said portions beingjoumaled on thefrqnt wall whichfront wall has at least one openingadjacent to the shaft portion, valve means combined with the shaft, asource of pressure liquid connected with the valve means and causing thepiston to move to discharge a volume of liquid when the shaft is turnedto so position capable of occupying the opening either in thewall or thegear, the overall length of the clutch between the ends of the lugsbeing slightly less than the distance between the confronting faces ofthe wall and gear.

WALTER LAMBERT.

